1 /* fs/ internal definitions
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
13 struct file_system_type;
19 struct shrink_control;
25 extern void __init bdev_cache_init(void);
27 extern int __sync_blockdev(struct block_device *bdev, int wait);
30 static inline void bdev_cache_init(void)
34 static inline int __sync_blockdev(struct block_device *bdev, int wait)
43 extern void guard_bio_eod(int rw, struct bio *bio);
44 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
45 get_block_t *get_block, struct iomap *iomap);
50 extern void __init chrdev_init(void);
55 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
56 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
57 const char *, unsigned int, struct path *);
62 extern void *copy_mount_options(const void __user *);
63 extern char *copy_mount_string(const void __user *);
65 extern struct vfsmount *lookup_mnt(struct path *);
66 extern int finish_automount(struct vfsmount *, struct path *);
68 extern int sb_prepare_remount_readonly(struct super_block *);
70 extern void __init mnt_init(void);
72 extern int __mnt_want_write(struct vfsmount *);
73 extern int __mnt_want_write_file(struct file *);
74 extern void __mnt_drop_write(struct vfsmount *);
75 extern void __mnt_drop_write_file(struct file *);
80 extern void chroot_fs_refs(const struct path *, const struct path *);
85 extern struct file *get_empty_filp(void);
90 extern int do_remount_sb(struct super_block *, int, void *, int);
91 extern int do_remount_sb2(struct vfsmount *, struct super_block *, int,
93 extern bool trylock_super(struct super_block *sb);
94 extern struct dentry *mount_fs(struct file_system_type *,
95 int, const char *, struct vfsmount *, void *);
96 extern struct super_block *user_get_super(dev_t);
108 extern struct file *do_filp_open(int dfd, struct filename *pathname,
109 const struct open_flags *op);
110 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
111 const char *, const struct open_flags *);
113 extern long do_handle_open(int mountdirfd,
114 struct file_handle __user *ufh, int open_flag);
115 extern int open_check_o_direct(struct file *f);
116 extern int vfs_open(const struct path *, struct file *, const struct cred *);
117 extern struct file *filp_clone_open(struct file *);
122 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
123 extern void inode_add_lru(struct inode *inode);
124 extern int dentry_needs_remove_privs(struct dentry *dentry);
126 extern bool __atime_needs_update(const struct path *, struct inode *, bool);
127 static inline bool atime_needs_update_rcu(const struct path *path,
130 return __atime_needs_update(path, inode, true);
133 extern bool atime_needs_update_rcu(const struct path *, struct inode *);
138 extern void inode_io_list_del(struct inode *inode);
140 extern long get_nr_dirty_inodes(void);
141 extern int invalidate_inodes(struct super_block *, bool);
146 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
147 extern int d_set_mounted(struct dentry *dentry);
148 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
149 extern struct dentry *d_alloc_cursor(struct dentry *);
154 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
159 extern const struct file_operations pipefifo_fops;
164 extern void group_pin_kill(struct hlist_head *p);
165 extern void mnt_pin_kill(struct mount *m);
170 extern const struct dentry_operations ns_dentry_operations;
175 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
177 extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
182 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
183 void *data, struct iomap *iomap);
185 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
186 unsigned flags, struct iomap_ops *ops, void *data,
187 iomap_actor_t actor);